<?php
$chuoi="";
for($i=1; $i<=6; $i++){
	$r = rand(0,9);
	$chuoi = $chuoi.$r;
?>
<img src="image/number/<?php echo $r ?>.PNG" width="20">
<?php } ?>

<input name="captcha_hide" type="hidden" value="<?php echo $chuoi ?>">